'use strict'



const path = require('path')
const defaultSettings = require('./src/settings.js')
// 导入compression-webpack-plugin
const CompressionWebpackPlugin = require('compression-webpack-plugin')

// 定义压缩文件类型
const productionGzipExtensions = ['js', 'css']

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Element Admin' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following method:
// port = 9527 npm run dev OR npm run dev --port = 9527
const port = process.env.port || process.env.npm_config_port || 9527 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: './',
  outputDir: '../views/dist',
  assetsDir: 'static',
  lintOnSave: false,
  productionSourceMap: false,
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: false
    },
    proxy: {
      // change xxx-api/login => mock/login
      // detail: https://cli.vuejs.org/config/#devserver-proxy
      /*'/api/gm_user/info':{
        target: `http://localhost:11122`,
        changeOrigin: true,
      },*/
      [process.env.VUE_APP_BASE_API]: {
        target: `http://127.0.0.1:${port}/mock`,
        changeOrigin: true,
        pathRewrite: {
          ['^' + process.env.VUE_APP_BASE_API]: ''
        }
      }
    },
    after: require('./mock/mock-server.js')
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    plugins: [
      new CompressionWebpackPlugin({
        filename: '[path].gz[query]',
        algorithm: 'gzip',
        test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
        threshold: 10240,
        minRatio: 0.8
      }),

    ]
  },
  chainWebpack(config) {
    config.entry('main').add('babel-polyfill')
    config.module
      .rule('image')
      .test(/\.ico$/)
      .use('url-loader')
      .loader('url-loader')
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    /* config.module
       .rule('scss')
       .oneOf('vue')
       .use('px2rem-loader')
       .loader('px2rem-loader')
       .before('postcss-loader') // this makes it work.
       .options({ remUnit: 190, remPrecision: 4 })
       .end()
     config.module
       .rule('css')
       .oneOf('vue')
       .use('px2rem-loader')
       .loader('px2rem-loader')
       .before('postcss-loader') // this makes it work.
       .options({ remUnit: 190, remPrecision: 4 })
       .end()
 */
    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
    config.when(true, config => {
      config
        .entry('app')
        .clear()
        .add('./src/main.js')

      // 通过externals加载外部CDN资源----1
     /* config.set('externals', {
        vue: 'Vue',
        //'vue-router': 'VueRouter',
        //axios: 'axios',
        //echarts: 'echarts',
        //nprogress: 'NProgress',
        //vuex:'Vuex',
        //'element-ui': 'ELEMENT',
      })*/
    })



  },

}
